[Dovecot] Dovecot's as server based and mail filters and addressbooks holder?

Hello.

I'm just wondering, that maybe is the time to change the imap -s format or add some more features, are in these day's most people, me also are so called mobile users. And imap is good solution for us but however still some basic things are missing, fore example:

1. Server side mail filters. I read mails from home, from office and from webmail. Now when I need to make mail filter, for example to

collect all dovecot mails into one subfolder, I can do it in one computer, and they works, if the computer is online, but if I need to change them, reading email from the another computer, I can't do it.

2. Server side address book. Yes, I know, ldap is solution, but installing and configuring the ldap server for some simple global address book, is kind of overkill.

And these rules/address book can be from client to see as subfolder, so every imap capable client can deal with them?

Is this real on not?

-- Sysadmin